
*{
  margin: 0;
  padding: 0;
  text-decoration: none;
  font-family: montserrat;
  box-sizing: border-box;
}

body{
  min-height: 100vh;
  background-image: linear-gradient(120deg, #3498db, #8e44ad);
}

.login-form{
  width: 360px;
  background: #f1f1f1;
  height: 580px;
  padding: 80px 40px;
  border-radius: 10px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.login-form h1{
  text-align: center;
  margin-bottom: 60px;
}

.txtb{
  border-bottom: 2px solid #adadad;
  position: relative;
  margin: 30px 0;
}

.txtb input{
  font-size: 15px;
  color: #333;
  border: none;
  width: 100%;
  outline: none;
  background: none;
  padding: 0 5px;
  height: 40px;
}
/* 消除input输入框记忆功能导致背景变色 */
/* input:-webkit-autofill {
  box-shadow: 0 0 0px 1000px #f1f1f1 inset !important;
  -webkit-box-shadow: 0 0 0px 1000px #f1f1f1 inset !important;
}  */

.txtb span{
  display: flex
}

.txtb span::before{
  content: attr(data-placeholder);
  position: absolute;
  top: 50%;
  left: 5px;
  color: #adadad;
  transform: translateY(-50%);
  z-index: -1;
  transition: .5s;
}

.txtb span::after{
  content: '';
  position: absolute;
  width: 0%;
  height: 2px;
  background: linear-gradient(120deg, #3498db, #8e44ad);
  transition: .5s;
}

.focus + span::before{
  top: -5px;
}

.focus + span::after{
  width: 100%;
}

.logbtn{
  display: block;
  width: 100%;
  height: 50px;
  border: none;
  border-radius: 5px;
  background: linear-gradient(120deg, #3498db, #8e44ad, #3498db);
  background-size: 200%;
  color: #fff;
  outline: none;
  cursor: pointer;
  transition: .5s;
}

.logbtn:hover{
  background-position: right;
}

.bottom-text{
  margin: 60px 45px;
  text-align: center;
  font-size: 13px;
}
